Below are the coordinates that align GSX with the Captain Sim B777-200ER-II_GE94B/200. They may work with the other 200ER models with different engine configurations, but I haven't tested them yet.
Just input these coordinates into the aircraft settings in GSX. If you have any issues or find better coordinates, please post them in the comments. Thank you.
----- B777-200ER-II GE94B/200 -----
Nosegear
Nosegear distance 25.80
Passengers Door #1
Door without open/close checks
Position -2.80 25.06 4.78
Angle 9.00
Passengers Door #2
Door without open/close checks
Position -3.08 14.66 4.90
Angle 0.00
Engine #1
Position -9.62 10.72 2.76
Passengers Door #3
Door without open/close checks
Position -3.08 -4.64 5.06
Angle 0.00
Passengers Door $4
Door without open/close checks
Position -2.68 -17.88 5.18
Angle -9.00
GPU
Position 1.12 24.74 2.64
Service Door #1
Door without open/close checks
Position 2.80 25.06 4.78
Angle -9.00
Cargo Door #1
Door without open/close checks
Position 1.74 19.94 2.92
Angle 0.00
BELT, AKC, AKE, ALF
Engine #2
Position 9.62 10.72 2.76
Deicer in
Position 3.56 9.28 4.66
Deicer out
Position 29.80 -8.74 7.12
Refueling Point
Position 13.32 2.60 5.14
Cargo Door #2
Position 1.70 -9.64 3.16
Angle 0.00
BELT, AKC, AKE, ALF
Service Door #2
Door without open/close checks
Position 2.68 -17.88 5.18
Angle 9.00
Lavatory
Position 0.00 0.00 0.00
Water
Position 0.00 0.00 0.00